DON't tow with the factory cover on, the straps will rip off. Don't use a smaller spare, the tires are rated at 1750 lbs each, pushing the envelope if you are over or improperly loaded. You can buy a mount for 20$ that moves the spare to the side rail of the trailer. No problems there. Got mine from Overtons.
Boat is loaded out and looks clean as a whistle. Beautiful. How many hours?